Calamity
mediumSevere weatherCalamity Score: 52

Severe weather near Montgomery

KendallUnited StatesNOAA

This alert expired on 5 July 2026 at 02:30 UTC. It is kept here as a record.

It is the 19th strongest of the 183 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 48 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Flash Flood Warning issued July 4 at 4:35PM CDT until July 4 at 9:30PM CDT by NWS Chicago IL

An estimated 3,320,960 people live within 50 km of this point.

Nearby, since 10 March 2026

How we know

Confirmed by 18 independent sources, including NOAA.

Our own score for this event is 52 out of 100, at 87 % confidence.

The score is ours, computed from intensity, exposed population and local history — not the source’s.

Event Data

TypeSevere weather
Severitymedium
Calamity Score (ours)52 / 100
Our confidence87%
Coordinates41.7081, -88.2906
Nearest CityMontgomery (6 km)
Population Exposed3.3M within 50 km
Impact Tiersignificant
Timestamp2026-07-04T21:35:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.a1fb93f5d4e696d376f7217b5c06938d

Score Breakdown

35
intensity
100
population
0
cascading
80
historical

Technical Details

EventFlash Flood Warning
UrgencyImmediate
CertaintyLikely
AreaDescLake, IN; DuPage, IL; Will, IL; Cook, IL; Will, IL; Lake, IN and 6 more areas
HeadlineFlash Flood Warning issued July 4 at 4:35PM CDT until July 4 at 9:30PM CDT by NWS Chicago IL
Expires2026-07-04T21:30:00-05:00
SenderNameNWS Chicago IL
HasExactCoordstrue
MergedCount10
MergedIds["noaa_urn:oid:2.49.0.1.840.0.a1fb93f5d4e696d376f7217b5c06938d4493cde9.001.1","noaa_urn:oid:2.49.0.1.840.0.e237756762b31828954ce34b07e117218e9a5baf.001.1","noaa_urn:oid:2.49.0.1.840.0.854dce4b51734a095099f83b450300a712655f2d.001.1","noaa_urn:oid:2.49.0.1.840.0.486c7685fd48e32c51591cbaa6844b24acf349fe.002.1","noaa_urn:oid:2.49.0.1.840.0.f497232c1bfc5bd1e9846538a8f0614ab7cd1833.001.1","noaa_urn:oid:2.49.0.1.840.0.2a5bb9e40af7314ebb7eed7b262922d3824ef299.001.1","noaa_urn:oid:2.49.0.1.840.0.38d200f1522a22903e7b388791778b2b69df6d3b.001.1","noaa_urn:oid:2.49.0.1.840.0.859108eafbb84a988dec03d02ffccc13f2006925.001.1","noaa_urn:oid:2.49.0.1.840.0.4ea7509782665b41e73e1a6781706dc7ac2a512a.002.1","noaa_urn:oid:2.49.0.1.840.0.bd4c19d57942e4538e6de434d674c9c183614cd0.001.1"]
Iem TypeSummaryF
Iem City1 S Bartlett
Iem CountyDuPage
Iem StateIL
Iem WfoLOT
Iem RemarkWater up to car doors along Bartlett and Stearns Road.
MergedSources[{"id":"iem_R_41.770_-88.770_1783198260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783198260000,"latitude":41.77,"longitude":-88.77},{"id":"iem_D_41.600_-88.550_1783195440000","source":"iem","severity":"low","severityValue":25,"timestamp":1783195440000,"latitude":41.6,"longitude":-88.55},{"id":"iem_E_42.040_-88.330_1783196400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783196400000,"latitude":42.04,"longitude":-88.33},{"id":"iem_G_41.820_-88.270_1783199040000","source":"iem","severity":"low","severityValue":25,"timestamp":1783199040000,"latitude":41.82,"longitude":-88.27},{"id":"iem_F_41.980_-88.170_1783198260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783198260000,"latitude":41.98,"longitude":-88.17},{"id":"iem_D_42.120_-88.430_1783193220000","source":"iem","severity":"low","severityValue":25,"timestamp":1783193220000,"latitude":42.12,"longitude":-88.43},{"id":"iem_F_42.130_-88.520_1783193700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783193700000,"latitude":42.13,"longitude":-88.52},{"id":"iem_D_42.140_-88.430_1783193160000","source":"iem","severity":"low","severityValue":25,"timestamp":1783193160000,"latitude":42.14,"longitude":-88.43},{"id":"iem_G_41.470_-88.060_1783197900000","source":"iem","severity":"low","severityValue":25,"timestamp":1783197900000,"latitude":41.47,"longitude":-88.06},{"id":"iem_F_42.080_-88.320_1783199700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783199700000,"latitude":42.08,"longitude":-88.32},{"id":"iem_R_42.000_-88.150_1783199100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783199100000,"latitude":42,"longitude":-88.15},{"id":"iem_E_42.090_-88.420_1783194780000","source":"iem","severity":"low","severityValue":25,"timestamp":1783194780000,"latitude":42.09,"longitude":-88.42},{"id":"iem_F_41.740_-88.500_1783198620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783198620000,"latitude":41.74,"longitude":-88.5},{"id":"iem_R_42.090_-88.440_1783199640000","source":"iem","severity":"low","severityValue":25,"timestamp":1783199640000,"latitude":42.09,"longitude":-88.44},{"id":"iem_G_41.560_-88.210_1783197600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783197600000,"latitude":41.56,"longitude":-88.21},{"id":"iem_R_41.770_-88.760_1783198800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783198800000,"latitude":41.77,"longitude":-88.76},{"id":"iem_F_41.970_-88.180_1783199700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783199700000,"latitude":41.97,"longitude":-88.18}]

Safety Information

During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.

Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.

This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.

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Calamity.live data shows a weather event with CalamityScore 52/100, near Montgomery (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.